How to use

Join

in

javax.jdo.annotations

@Join
private Set<UnidirJoinChildEntity> children = new HashSet<UnidirJoinChildEntity>();

for (int j=0;j<js.length;j++)
  String deleteAction = JDOAnnotationUtils.getForeignKeyActionString(js[j].deleteAction());
  joins[j] = new JoinMetaData(cmd, js[j].table(), null, null, 
    js[j].column(), js[j].outer(), deleteAction, js[i].indexed(), js[i].unique());

joinmd.setTable(join.table());
joinmd.setColumnName(join.column());
joinmd.setIndexed(IndexedValue.getIndexedValue(join.indexed()));
joinmd.setOuter(MetaDataUtils.getBooleanForString(join.outer(), false));
joinmd.setUnique(join.unique());
joinmd.setDeleteAction(JDOAnnotationUtils.getForeignKeyActionString(join.deleteAction()));
JDOAnnotationUtils.addExtensionsToMetaData(joinmd, join.extensions());

@Join
private Set<PolyInterface> children = new HashSet<PolyInterface>();

@Join
@Extension(vendorName="datanucleus", key="mapping-strategy", value="identity")
private Set<PolyInterfaceIdentityStrategy> children = new HashSet<PolyInterfaceIdentityStrategy>();